<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div style="margin:0 auto">
    <h1>BMI测试</h1>
    <form action="/bmi">
        <input type="text" name="height" placeholder="身高（单位米）">
        <input type="text" name="weight" placeholder="体重（单位公斤）">
        <input type="submit">
    </form>
</div>

</body>
</html>